Dental rotary saw



FIG. 1 is a top, front and right side perspective view of a dental rotary saw showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a left side elevational view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a dental rotary saw, as shown. 